SUJET : Passthrough list (radio) question answers

I am using LimeSurvey to collect data for a student repeatedly. I'd like to pass some data using INSERTANS using End URL. The strategy could be easily implemented with text field. But how to do this with list (radio) questions? Thanks!

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I did manage to do it using javascript by assigning the selected radio button to a hidden short text question and then retrieve the value after the survey (one group one page) is reloaded using the end URL.